ABAP Select data from SAP table FKKCMP_TC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FKKCMP_TC table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to FKKCMP_TC. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the FKKCMP_TC table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_FKKCMP_TC TYPE STANDARD TABLE OF FKKCMP_TC,
      WA_FKKCMP_TC TYPE FKKCMP_TC,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <FKKCMP_TC> TYPE FKKCMP_TC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FKKCMP_TC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FKKCMP_TC
  INTO TABLE IT_FKKCMP_TC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKCMP_TC
*  INTO TABLE @DATA(IT_FKKCMP_TC2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_FKKCMP_TC INDEX 1 INTO DATA(WA_FKKCMP_TC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FKKCMP_TC ASSIGNING <FKKCMP_TC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKCMP_TC>-MANDT = 1.
<FKKCMP_TC>-KEYS1 = 1.
<FKKCMP_TC>-POSZA = 1.
<FKKCMP_TC>-CHCKN = 1.
<FKKCMP_TC>-BUKRS = 1.

ENDLOOP.

LOOP AT IT_FKKCMP_TC INTO WA_FKKCMP_TC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKCMP_TC-GSBER, sy-vline,
  WA_FKKCMP_TC-BVRKO, sy-vline,
  WA_FKKCMP_TC-HBKID, sy-vline,
  WA_FKKCMP_TC-HKTID, sy-vline,
  WA_FKKCMP_TC-VALUT, sy-vline,
  WA_FKKCMP_TC-HERKF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKCMP_TC you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_FKKCMP_TC TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_FKKCMP_TC INTO WA_FKKCMP_TC.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field CHCKN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKCMP_TC-CHCKN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKCMP_TC-CHCKN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BVRKO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKCMP_TC-BVRKO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKCMP_TC-BVRKO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GPART
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKCMP_TC-GPART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKCMP_TC-GPART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKCMP_TC-VKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKCMP_TC-VKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VTREF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKCMP_TC-VTREF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKCMP_TC-VTREF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKKCMP_TC-OPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKKCMP_TC-OPBEL.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_FKKCMP_TC_STR, 
MANDT TYPE STRING,
KEYS1 TYPE STRING,
POSZA TYPE STRING,
CHCKN TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
BVRKO TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
VALUT TYPE STRING,
HERKF TYPE STRING,
APPLK TYPE STRING,
BLART TYPE STRING,
BUDAT TYPE STRING,
BLDAT TYPE STRING,
FAEDN TYPE STRING,
VALID TYPE STRING,
FIKEY TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
VTREF TYPE STRING,
BUKRS_OP TYPE STRING,
GSBER_OP TYPE STRING,
BETRW TYPE STRING,
WAERS TYPE STRING,
OPBEL TYPE STRING,
TXTVW TYPE STRING,
XNODOC TYPE STRING,
SUBAP TYPE STRING,
VOIDRS TYPE STRING,
AUDAT TYPE STRING,
AUNAM TYPE STRING,
AUORT TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
STATS TYPE STRING,
FLAG TYPE STRING,
XONDB TYPE STRING,
XDELETE TYPE STRING,
XCHANGE TYPE STRING,
XACTIVE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKCMP_TC_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_FKKCMP_TC_STR-MANDT sy-vline 
WA_FKKCMP_TC_STR-KEYS1 sy-vline 
WA_FKKCMP_TC_STR-POSZA sy-vline 
WA_FKKCMP_TC_STR-CHCKN sy-vline 
WA_FKKCMP_TC_STR-BUKRS sy-vline 
WA_FKKCMP_TC_STR-GSBER sy-vline 
WA_FKKCMP_TC_STR-BVRKO sy-vline 
WA_FKKCMP_TC_STR-HBKID sy-vline 
WA_FKKCMP_TC_STR-HKTID sy-vline 
WA_FKKCMP_TC_STR-VALUT sy-vline 
WA_FKKCMP_TC_STR-HERKF sy-vline 
WA_FKKCMP_TC_STR-APPLK sy-vline 
WA_FKKCMP_TC_STR-BLART sy-vline 
WA_FKKCMP_TC_STR-BUDAT sy-vline 
WA_FKKCMP_TC_STR-BLDAT sy-vline 
WA_FKKCMP_TC_STR-FAEDN sy-vline 
WA_FKKCMP_TC_STR-VALID sy-vline 
WA_FKKCMP_TC_STR-FIKEY sy-vline 
WA_FKKCMP_TC_STR-GPART sy-vline 
WA_FKKCMP_TC_STR-VKONT sy-vline 
WA_FKKCMP_TC_STR-VTREF sy-vline 
WA_FKKCMP_TC_STR-BUKRS_OP sy-vline 
WA_FKKCMP_TC_STR-GSBER_OP sy-vline 
WA_FKKCMP_TC_STR-BETRW sy-vline 
WA_FKKCMP_TC_STR-WAERS sy-vline 
WA_FKKCMP_TC_STR-OPBEL sy-vline 
WA_FKKCMP_TC_STR-TXTVW sy-vline 
WA_FKKCMP_TC_STR-XNODOC sy-vline 
WA_FKKCMP_TC_STR-SUBAP sy-vline 
WA_FKKCMP_TC_STR-VOIDRS sy-vline 
WA_FKKCMP_TC_STR-AUDAT sy-vline 
WA_FKKCMP_TC_STR-AUNAM sy-vline 
WA_FKKCMP_TC_STR-AUORT sy-vline 
WA_FKKCMP_TC_STR-ERNAM sy-vline 
WA_FKKCMP_TC_STR-ERDAT sy-vline 
WA_FKKCMP_TC_STR-ERTIM sy-vline 
WA_FKKCMP_TC_STR-AENAM sy-vline 
WA_FKKCMP_TC_STR-AEDAT sy-vline 
WA_FKKCMP_TC_STR-AETIM sy-vline 
WA_FKKCMP_TC_STR-STATS sy-vline 
WA_FKKCMP_TC_STR-FLAG sy-vline 
WA_FKKCMP_TC_STR-XONDB sy-vline 
WA_FKKCMP_TC_STR-XDELETE sy-vline 
WA_FKKCMP_TC_STR-XCHANGE sy-vline 
WA_FKKCMP_TC_STR-XACTIVE sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.